Water heater



Oct. 28, 1930.

E. F. HOLAINGER WATER HEATER F iled July 25 1923 2 Sheets-Sheet 2 {MILINVENTOR ou/vqa? 5W ATTORNEY latentecl Oct. 28, 1930 v UNITED STATES.

PATENT"oFFicE EMIL F. HOLINGER, on NEW YORK, N. Y., ASSIGNOR To-Hunso'NELECTRICAL HEATING CORPORATION, or NEW YORK, 1v. Y., ;A CORPORATION, orNEW YORK WATER HEATER 1 Application filed July 25,

This invention relates generally to water heaters for domestic use,- butis more particularly designed to produce such a heater adapt- I ed foroperation by an electrically operated 5 heating member. In essence theinvention comprises a water holding tank having an opening in one Walland an apparatus adapted to hold an electrically operated, orequivalent, heating unit and distribute the heat therefrom, whichapparatuscan be inserted through said opening as a unit and thenattached to the tank for closing said opening.

The best form of apparatus at present known to me embodying my inventionis illustrated 1n the accompanying two sheets of drawing in which sFig.1 is a vertical central-section of thehot waterheater, and r Fig. 2 is ahorizontal section on line ofFig.1.

Throughout the drawings like reference characters indicate like parts. 7

1 is a cylindrical boiler shell, 1 the top or dome sheet therefor weldedor otherwise joined to one end thereof and 1 the inwardly dished'bottomhead welded to the other end of shell 1. A hole 2 is formed preferablycentrally of theheater dome 1*,and

. this is surrounded by. a welded-011 ring 3, to which a cover. plate 1-may be held by bolts 5, 5. A tube 6, adapted to contain an electricheating member or other heating member,

has one end welded into an opening in plate 4. Tube 6 is closed at itsother end by plate 7 preferably welded thereto, and this plate carries acentral, projecting pin 8 which engages an opening 10 in'the bridge-likemember 9, which is welded to the bottomhead 1". As shown, pin 8 is ashort section of tube, as this can be conveniently welded to plate 7;

Thenipple 11 serves as the water inlet connection to water tank formedby1, 1, 1",

and 12 is the nipple for the outlet connection.'

13 is a nipple for a drain connection and 14 a nipple for a thermostat.I

15 is the cylindrical portion of an outer shell adapted to be closed atone end by the bottom plate 15", which may be welded there- 59 to, andalso at the other end by the top plate by radiation from thehot watertank.

1928. Serial No. 295,134.

15*. This casing 15, 15*,15", surrounds the Fig. 1.

17 is a cylindrical skirt'or jacket surrounding heater-holding tube 6and welded thereto at the upper end, near which point it ,is

provided with openings 18,'18,vin its walls.

The lower end of this tubular skirt 17 is left open and may be centeredwith'reference to tube 6 by inserting three pins 19 in the annular spacebetween the two tubes. 20 is a third tube surrounding tubular jackets'17 and leaving a small annular space between the two, said tube QObeing welded to tube 17 F at either end so as to form ahermeticallysealed annular air jacket around it.

In assembling the parts the water tank 1 is set in the jacket shell 15,being accurately centered with reference thereto by the flanges of thetank head 1 slipping over the inwardly curved uide lugs 16, 16, on thebottom plate 15 of the outer casing. The various nipples 11, 12, 13, 14,are then inserted and the heater-carrying unit is placed in the tank,the pin 8 engaging the recess 10 in the member 9 to center the same. Thespace be- -tween the walls of the tank and the casing 15 may then befilled with any loose heat insulating material, the jacket cover 15 isplaced in position, and bolts 5, 5, inserted through it and throughplate 41 into ring?) to hold the parts together, and close theopening towater tank 1. a

While the heater carrying unit is rigidly fastened only at one end, thepin Sin the other endand nestedin member 9serves to prevent itsvibrating injuriously during transportation and handling of theheater.

. If anything goes wrong with the heating apparatus, the whole unit canbe removed at once by simply taking out bolt 5, 5, and a new oneinserted. 7

r In operation the water in the annular space :i:

between tube 6 and its tubular skirt 17 is rapidly heated by radiationand conduction from the heater in tube 6 and rises with correspondingrapidity, flowing out through the holes 18. This zone of high heatinside of tube 17 is protected from cooling by direct radiation to thewater in the body of the tank by means of the air jacket formed by outertube 20, as beforeexplained. As a result whenever the heat is turned onthere will be promptly produced aflbodyof warm or hot water at the topof tank 1 long before the main body of the water in the middle and lowerportion has absorbed any substantial amount of heat. This quickly formedbody of hot water can be drawn immediatel upon by the user to whom itwill be de ivered through the discharge nipple 12, and incoming coldwater through inlet nipple 11 will largely pass immediately to the lowerend of the tube 17 and upward within the same to be immediately heatedand delivered at the top of the tank to maintain the supply of hot waterthere segregated for immediate use. Vhen the user ceases to draw on thissupply, and the heater is continued in action, the hot water zone willgradually extend downward and through the body of the tank as the waterconfined therein moves in closed loop paths producing element throughits other end, a

surrounding skirt for said tube welded to said tube at oneend andprovided with perforations in its walls near said end, whereby it isadapted to form an annular water passage between said tube and skirt,and a sealed air jacket surrounding said skirt comprising a continuoustube of larger diameter welded to said skirt near each end thereof.

2. In a water heater the combination of a water tight tank having anopening in its upper wall and a heater-holding unit comprising a tubularshaped structure closed at one end, open at the other end, and having aflange surrounding said open end fastened to said tank wall around themargin of the opening therein; whereby said heater-holding unit may bereadily'mounted in, or removed from, said tank interior combined with aprojection from the closed end of said heater holding unit and aperforated member carried by the adjacent walls of the tank engagingsaid projection.

3. In a water heater the combination of :1

cylindrical tank having an opening in one head, a tube adapted to beinserted through said opening, said tube being closed at one end andprovided at the other with a flange adapted to be fastened to said tankhead around said opening, bolts for fastenin said flange to said tankhead, and a tube of filrger diameter surrounding said first mentionedtube, fastened to it near its flanged end and provided with perforationsnear its saidfastening and opening at'itsothe'r end, together with athird tube of still larger diameter surrounding said seoond tube andsealed thereto at either endpwhereby an annular water circulatingpassage is formed around said first mentioned tube and aheatfinsulatingjacket formed about saidsecondtube.

4. In. a water heater'the combination of a cylindrical tank having anopening in one head, a tube inserted through said opening, said tubebeing closed at one end and provided at the other with a flange fastenedto said tankhead around said opening, and a tube of larger diametersurrounding said first mentioned tube, fastened to it near'itsflangedend, and provided with perforations near its said fastening,together with a projection from the closed end of said first mentionedtube and a recessed member for engaging said projection mounted ontheother through said opening and attached to said wall, the free end ofthe heater carrying unit engaging a recessed member carried by theadjacent wall of the tank and to be thereby supported. a

6. In a water heater :1 heater-holding unit comprising, in combination,a-tube closed at one end, a second tube surrounding'the first mentionedone and fastened thereto at one end and a plurality of pins insertedbetween the free ends of the two tubes to hold said; ends concentric oneto another.

7 In a water heater the combination of a cylindrical, water-tighttankhaving an inwardly dished bottom head, and a cylindrical shell for aheat insulating jacket surrounding i saidtank, the bottom plate of saidshell having a series of circumferentially arranged. inwardly curvedlugs set'on theinner surface thereof having exterior convexly curvedfaces adapted to engage the interior of then flange of said tank bottomhead and center it with reference to said shell when the parts areassembled.

' EMIL F. HOLINGER.

